Why is C# 450% slower than C++ on nested loops ??

[Peter Olcott]

http://www.tommti-systems.de/go.html...enchmarks.html
The above link shows that C# is 450% slower on something as simple as a nested
loop. Is this because .NET is inherently slower or does the C# compiler merely
produce code that is not as well optimized as the C++ compiler?

[Nicholas Paldino [.NET/C# MVP]]

For those that would like more information on why this question is being
asked, see the following link:

http://groups.google.com/group/micro...cc573d00467eec

A good amount of the reply, and the OPs misunderstandin g of the nature
of .NET and the CLR is in this thread.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Peter Olcott" <ol****@att.net > wrote in message
news:l_Asf.3805 9$QW2.19657@duk eread08...

http://www.tommti-systems.de/go.html...enchmarks.html
The above link shows that C# is 450% slower on something as simple as a
nested loop. Is this because .NET is inherently slower or does the C#
compiler merely produce code that is not as well optimized as the C++
compiler?

[Peter Olcott]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:em******** *********@tk2ms ftngp13.phx.gbl ...

For those that would like more information on why this question is being
asked, see the following link:

http://groups.google.com/group/micro...cc573d00467eec
So then it seems that your contention (based on the message that the link points
to) is that the whole difference is because of poorer code generation by the C#
compiler.

A good amount of the reply, and the OPs misunderstandin g of the nature of
.NET and the CLR is in this thread.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Peter Olcott" <ol****@att.net > wrote in message
news:l_Asf.3805 9$QW2.19657@duk eread08...

http://www.tommti-systems.de/go.html...enchmarks.html
The above link shows that C# is 450% slower on something as simple as a
nested loop. Is this because .NET is inherently slower or does the C#
compiler merely produce code that is not as well optimized as the C++
compiler?

[Nicholas Paldino [.NET/C# MVP]]

Not at all. I never said .NET was slower than C++ code, nor did I say
that if it was slower, it was because C# compiles in a more inefficent
manner.

The thing you don't get is that IL runs through the CLR, which
transforms it into native code that is then run. End of story. Until you
accept that, none of the benchmarks or claims that you make will be valid.
Especially if you don't post the code in question which you claim is:

- 100 lines
- patent pending
- part of a system which is worth millions of dollars

You seem to have a history of long, intentionally confrontational posts
and we don't need another one.

Now I'm really done feeding the troll.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Peter Olcott" <ol****@att.net > wrote in message
news:BzBsf.3806 4$QW2.15791@duk eread08...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote
in message news:em******** *********@tk2ms ftngp13.phx.gbl ...

For those that would like more information on why this question is
being asked, see the following link:

http://groups.google.com/group/micro...cc573d00467eec

So then it seems that your contention (based on the message that the link
points to) is that the whole difference is because of poorer code
generation by the C# compiler.

A good amount of the reply, and the OPs misunderstandin g of the nature
of .NET and the CLR is in this thread.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Peter Olcott" <ol****@att.net > wrote in message
news:l_Asf.3805 9$QW2.19657@duk eread08...

http://www.tommti-systems.de/go.html...enchmarks.html
The above link shows that C# is 450% slower on something as simple as a
nested loop. Is this because .NET is inherently slower or does the C#
compiler merely produce code that is not as well optimized as the C++
compiler?

[Michael Bray]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
news:eF******** *****@TK2MSFTNG P15.phx.gbl:

- part of a system which is worth millions of dollars

The part I don't get is that the money-men are going to let a little thing
like "must be written in .NET" get between them and their millions. :)

-mdb

[Nicholas Paldino [.NET/C# MVP]]

Michael,

I guess that's why I don't have millions of dollars already! =)
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Michael Bray" <mbray@makeDInt oDot_ctiusaDcom > wrote in message
news:Xn******** *************** *****@207.46.24 8.16...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote
in
news:eF******** *****@TK2MSFTNG P15.phx.gbl:

- part of a system which is worth millions of dollars

The part I don't get is that the money-men are going to let a little thing
like "must be written in .NET" get between them and their millions. :)

-mdb

[Joanna Carter [TeamB]]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> a écrit
dans le message de news: eF************* **@TK2MSFTNGP15 .phx.gbl...

| Now I'm really done feeding the troll.

Heh, you ought to come and see what we have had to deal with in our non-tech
group :-))

Joanna

--
Joanna Carter [TeamB]
Consultant Software Engineer

[Peter Olcott]

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:eF******** *******@TK2MSFT NGP15.phx.gbl.. .

Not at all. I never said .NET was slower than C++ code, nor did I say that
if it was slower, it was because C# compiles in a more inefficent manner.
If you look at what I said, you will see that you just agreed with what I said.

The thing you don't get is that IL runs through the CLR, which transforms
it into native code that is then run. End of story. Until you accept that,
none of the benchmarks or claims that you make will be valid. Especially if
you don't post the code in question which you claim is:

- 100 lines
- patent pending
- part of a system which is worth millions of dollars

You seem to have a history of long, intentionally confrontational posts and
we don't need another one.

Now I'm really done feeding the troll.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m
"Peter Olcott" <ol****@att.net > wrote in message
news:BzBsf.3806 4$QW2.15791@duk eread08...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
message news:em******** *********@tk2ms ftngp13.phx.gbl ...

For those that would like more information on why this question is being
asked, see the following link:

http://groups.google.com/group/micro...cc573d00467eec

So then it seems that your contention (based on the message that the link
points to) is that the whole difference is because of poorer code generation
by the C# compiler.

A good amount of the reply, and the OPs misunderstandin g of the nature of
.NET and the CLR is in this thread.

--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Peter Olcott" <ol****@att.net > wrote in message
news:l_Asf.3805 9$QW2.19657@duk eread08...

http://www.tommti-systems.de/go.html...enchmarks.html
The above link shows that C# is 450% slower on something as simple as a
nested loop. Is this because .NET is inherently slower or does the C#
compiler merely produce code that is not as well optimized as the C++
compiler?

[Peter Olcott]

"Michael Bray" <mbray@makeDInt oDot_ctiusaDcom > wrote in message
news:Xn******** *************** *****@207.46.24 8.16...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> wrote in
news:eF******** *****@TK2MSFTNG P15.phx.gbl:

- part of a system which is worth millions of dollars

The part I don't get is that the money-men are going to let a little thing
like "must be written in .NET" get between them and their millions. :)

If it can be written in .NET without any loss of speed it might have greater
value. It would seem to me that non managed code will be eventually phased out,
at least on the MS Windows platform.

-mdb

[Nicholas Paldino [.NET/C# MVP]]

Joanna,

Which one, alt.inventors? That's a non-tech group I saw...
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

"Joanna Carter [TeamB]" <jo****@not.for .spam> wrote in message
news:%2******** ************@TK 2MSFTNGP12.phx. gbl...

"Nicholas Paldino [.NET/C# MVP]" <mv*@spam.guard .caspershouse.c om> a écrit
dans le message de news: eF************* **@TK2MSFTNGP15 .phx.gbl...

| Now I'm really done feeding the troll.

Heh, you ought to come and see what we have had to deal with in our
non-tech
group :-))

Joanna

--
Joanna Carter [TeamB]
Consultant Software Engineer